package top.lrshuai.design.create.prototype05;

import java.util.Hashtable;

public class ShapeCache {
    private static Hashtable<String, Shape> shapeMap = new Hashtable<String, Shape>();

    public static Shape getShape(Integer id) {
        Shape cachedShape = shapeMap.get(id.toString());
        return (Shape) cachedShape.clone();
    }

    // 对每种形状都运行数据库查询，并创建该形状
    // shapeMap.put(shapeKey, shape);
    // 例如，我们要添加三种形状
    public static void loadCache() {
        Circle circle = new Circle();
        circle.setId(1);
        shapeMap.put(circle.getId().toString(),circle);

        Square square = new Square();
        square.setId(2);
        shapeMap.put(square.getId().toString(),square);

        Rectangle rectangle = new Rectangle();
        rectangle.setId(3);
        shapeMap.put(rectangle.getId().toString(),rectangle);
    }
}
